Level Controllers are notable for their reliability, ease of maintenance and a long service life. The level controller mechanical part operates according to the fully proven liquid displacement ("float") and torque tube principles. The device includes a displacer connected to a torque tube assembly for a simple and accurate method of transferring motion from the displacer to a pneumatic transmitter and/or controller mechanism. One of the main benefits of such types of level controllers is the measurement method according to which they are operating. This method is widely known and almost excludes any errors and inaccuracies at liquid media control.